''Acartia ensifera'' is a species of marine copepod belonging to the family Acartiidae. This is a slender copepod, around in length, with distinctively long caudal rami. It is found around the coasts of New Zealand.

References

''Acartia ensifera'' at World of Copepods
Calanoida Crustaceans described in 1899 Marine crustaceans of New Zealand {{copepod-stub